fix whitespace bogon in some versions of make

With three different make binaries I have available, configuring a
pristine QEMU tree and attempting to make gives the cryptic:

Makefile:27: *** missing separator.  Stop.

This patch fixes it (presumably because it makes the output of
`set-vpath' be an empty string, rather than a bit of whitespace), but I
don't understand why this hasn't been a problem for other folks before.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/rules.mak b/rules.mak
index 5941b73..7e10432 100644 (file)
--- a/rules.mak
+++ b/rules.mak
@@ -40,7 +40,7 @@ cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
               >/dev/null 2>&1 && echo OK), $2, $3)
 
 VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi
-set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES), $(eval vpath $(PATTERN) $1)))
+set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 
 # Generate timestamp files for .h include files